Rare earth-based conversion coatings under scrutiny: A comprehensive review

IF 5.2 1区化学 Q1 CHEMISTRY, APPLIED

Journal of Rare Earths Pub Date : 2024-07-02 DOI:10.1016/j.jre.2024.07.002

Reza Amini, Pooneh Kardar

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引用次数: 0

Abstract

Extensive research efforts have been dedicated to enhancing the corrosion resistance properties and mitigating the reactivity of metals. Various surface modification techniques, including anodizing, electrochemical deposition, non-electric current-based coating, ion implantation, conversion coatings, and organic coatings, have been explored for these objectives. Among these surface modification methodologies, conversion coatings have garnered substantial attention due to their capacity of depositing onto metal surfaces uniformly, enhancing adhesion for subsequent layers, facilitating ease of application, and offering cost-effectiveness. Different coatings, each possessing distinct properties, have been employed for diverse metals. Nonetheless, in light of hexavalent chromium compounds' elevated toxicity and carcinogenic nature, environmentally compatible conversion coatings are actively sought as viable alternatives. The deposition of conversion coatings is an intricate process influenced by several variables. Consequently, laboratory optimization of conditions is imperative for commercializing specialized conversion coatings. Further research endeavors are warranted to expand the standards and requisite characteristics for specific applications. Composite conversion coatings, formulated with rare earth elements and innovative mineral and organic transformative agents, hold promise as a subject of investigation. Advanced studies in theoretical research and computer modeling about the mechanism of crack prevention in rare earth element-based conversion coatings devoid of defects will yield valuable insights. The present work furnishes a comprehensive review of this subject, marking its inaugural examination.

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稀土基转化涂料受关注：全面回顾

大量的研究工作致力于提高金属的耐腐蚀性能和减轻金属的反应性。各种表面改性技术，包括阳极氧化、电化学沉积、非电流基涂层、离子注入、转化涂层和有机涂层，已经被探索用于这些目标。在这些表面改性方法中，转换涂层由于其均匀沉积在金属表面的能力，增强后续层的附着力，便于应用，并提供成本效益而获得了大量关注。不同的涂层，每一种都有不同的性能，被用于不同的金属。然而，鉴于六价铬化合物的高毒性和致癌性，环境兼容的转换涂层被积极寻求作为可行的替代品。转化涂层的沉积是一个复杂的过程，受多种因素的影响。因此，实验室条件的优化是必要的商业化专门转化涂料。进一步的研究工作是必要的，以扩大标准和必要的特性，为具体的应用。复合转化涂料，由稀土元素和创新的矿物和有机转化剂配制，有希望作为一个研究课题。对无缺陷稀土元素基转化涂层防裂机理的理论研究和计算机建模的深入研究将产生有价值的见解。本工作对这一主题进行了全面的审查，标志着它的首次审查。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Rare Earths 化学-应用化学

CiteScore

8.70

自引率

14.30%

发文量

374

审稿时长

1.7 months

期刊介绍： The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and complete experimental data. It represents high academic standards and new progress in the RE field. Due to the advantage of abundant RE resources of China, the research on RE develops very actively, and papers on the latest progress in this field emerge every year. It is not only an important resource in which technicians publish and obtain their latest research results on RE, but also an important way of reflecting the updated progress in RE research field. The Journal of Rare Earths covers all research and application of RE rare earths including spectroscopy, luminescence and phosphors, rare earth catalysis, magnetism and magnetic materials, advanced rare earth materials, RE chemistry & hydrometallurgy, RE metallography & pyrometallurgy, RE new materials, RE solid state physics & solid state chemistry, rare earth applications, RE analysis & test, RE geology & ore dressing, etc.